Yeah, I don't see how it's a downside at all.

If you don't trust the public storage, just pretend nothing changed and it isn't there (don't use it).
No need to campaign against it since you are afraid to lose something.

The really nice benefit will be storage in the shops on plot and in lairs. Maybe some of the crowded silos can be taken out to make plots look nicer. This is nothing but good.